Reservoir Characteristics And Development Tragidies Of Low Saturated-oil Reservoirs In Hongtai Area

The low-permeability and low-saturation reservoirs in the Taibei sag of the Turpan-Hami basin have the characteristics of "multi-faceted and wide-spread". In different blocks and different layers such as Hongtai structural belt, Shanshan arc belt and Huoyanshan structure belt, . The characteristics and main controlling factors of low permeability and low saturation oil reservoirs are analyzed by using drilling, seismic and analytical test data to guide the next exploration. The results show that the reservoirs with low permeability and low saturation are mainly controlled by reservoir and structure. The reservoir properties are poor, the pore throat radius is small and the oil displacement is low during the process of reservoir formation. The main reservoir-forming period is in the middle and late Yanshanian, and its ancient tectonic form basically laid the direction of the dominant migration and accumulation of oil reservoir,and the Himalayan tectonic movement has certain destructive and adjusting effect on the reservoir, which is the result of oil saturation The secondary cause for further reduction. The next step is to find the reservoir "dessert", which is the exploration direction of low permeability and low saturation oil reservoir, on the basis of favorable reservoir forming background and combining the ancient structure and present tectonic characteristics. On the basis of clarifying the law of high enrichment of low saturation reservoirs, by developing the data of laboratory test and water flooding test, combined with the development of well placement, a suit of low permeability and low saturation oil reservoir Development program.